Cayde-6 is gone.
The wise-cracking Hunter met his demise at the beginning of Destiny 2: Forsaken's campaign, and he will be missed—but you can carry a memento of his in your primary weapon slot forever with his Ace of Spades Exotic hand cannon.
Ace of Spaces, Cayde's famous hand cannon, is used by Uldren himself to finish off the Vanguard, so it's important to get it back in a good guy's hands. The weapon is acquired through a lengthy quest in Forsaken. Here are the steps:
|Reclaim Ace of Spades from Uldren Sov|
|Take the broken Ace of Spades to Banshee-44|
|Get 5 Invasion kills with a hand cannon in Gambit|
|Eliminate 250 enemies in Strikes with a hand cannon|
|Get 25 Precision kills with a hand cannon in Crucible|
|Search the solar system for Cayde's personal caches|
|Complete mission "Ace in the Hole"|
|Return to Banshee-44|
First, you must finish the campaign. Doing this will get you the broken Ace of Spades back. Then, take it to the Gunsmith, Banshee-44, in the Tower to get your next step.
The wording of the next step is a bit confusing. You must play Gambit and use a hand cannon to kill five invaders, meaning enemy players who invade your team's domain. After that, your next step is to run Strikes with a hand cannon for 250 kills.
Once you've finished the Strike step, head to the Crucible and start getting headshots. You'll need 25 kills with headshots to move to the next step, which is to search throughout the solar system for Cayde's personal caches.
There are four total caches you'll need to find. There's one on Earth in the EDZ, one on Io, one on Nessus, and one in the Tangled Shore. A Reddit user by the name of iiParallaxed compiled locations of all of them.
The EDZ cache is found in Firebase Hades, the Io one is in the Wraith Mines area, the Nessus cache is found near the beginning of the Exodus Crash site in the Exodus Black area, and the Tangled Shore one is found to the south of the map past the Jetsam area.
Once you've found all the caches, you will unlock a new mission on Titan called "Ace in the Hole." Complete the mission, head back to Banshee-44 one last time, and he will give you the Ace of Spades. Put it to good use, Guardian.